Suter



Oct. 21, 1952 I H. SUTER 2,614,753

ZEROIZING MECHANISM IN CALCULATING MACHINES Filed July 15, 1947 6 SheeIs-Sheet l I l i iv b 22 22 J a 2 79 22 1 E e/760w H. SUTER ZEROIZING MECHANISM IN CALCULATING MACHINES Filed July 15, 1947 Oct. 21, 1952 6 Sheets-Sheet 2 Oct. 21, 1952 H. SUTER 2,614,753

ZEROIZING MECHANISM IN CALCULATING MACHINES Filed July 15, 1947 I 6 Sheets-Sheet 3 jm enfo/n' ZQM Oct 21, 1952 SUTER 2,614,753

ZEROIZING MECHANISM IN CALCULATING MACHINES Filed July 15, 1947 6 Sheets-Sheet 4 Oct. 21, 1952 H. SUTER ZEROIZING MECHANISM IN CALCULATING MACHINES 6 Sheets-Sheet 5 Filed July 15, 1947 Oct. 21, 1952 SUTER ZEROIZING MECHANISM IN CALCULATING MACHINES 6 Sheets-Sheet 6 Filed July 15, 1947 INVENTOR. M13446 Patented Oct. 21, 1952 ZEROIZING MECHANISM IN CALCULATING MACHINES Heinrich Suter, Zurich, Switzerland, assignor to H. W. Egli A. G., Zurich, Switzerland Application July 15, 1947, Serial No."761,003 In Switzerland March 9, 1945 Section 1, Public Law 690, August s, 1946 Patent expires March 9, 1965 Claims.

My invention relates to a zeroizing or clearing mechanism in a calculating machine comprisin operatively interengageable totalizer dials for decimal transfer. When turning such a dial through an angle corresponding to an ordinal unit thereof, the adjacent dial of the next higher decimal order is turned through an angle which. amounts to a fraction of the first angle. When, therefore, the first dial is turned through a full revolution, the second dial isturned through an angle corresponding to a unit of its own de nomination.

In calculating machines of this class, a con ventional zeroizing mechanism cannot be used for clearing the dials.

The dials of the zeroizing mechanism acoording to my present invention, now, are provided, apart from a collective clearing member, example, a rack, with a restoring slide which is moved in dependency of the said member and which aids in zeroizing the dials.

Such provision permits of clearing a value registered inthe accumulator of the machine, and to simultaneously transfer same into the key board setting mechanism or an auxiliary mechanism for temporary storage which, as known, in the art, is of great advantage.

One form of invention is shown in the drawings, by way of example, as applied to a calculating machine comprising parallel dial shafts.

The drawings substantially are limited to the parts and portions reduisite for explaining my invention, and in which:

Fig. 1 shows an elevation, Fig. 2 a partial horizontal section of Fig. i, Fig. 3 a partial side view, Fig. 4 two adjacent totalizer shafts in elevation, their appurtenant parts having been demounted therefrom,

Fig. 5 perspectively a plurality oi totalizer shafts with their appurtenant parts,

Fig. 6 perspectively the restoring slide,

Fig. 7 in section, a totalizer shaft with gear parts including clearing rack and restoring slide,

Figs. 8-10 are views similar to Fig. 7, for ex plaining the operation of the elements shown,

Figs. ll-lla together show perspectively parts and portions of the clearing mechanism and of a correcting device which serves to adjust the additionally turned dials into their correct ordinal position,

Fig. 12 shows a part of Fig. 11 in side View,

Fig. 13 a toothed slide and its actuating arm,

Fig. 14 a cam wheel provided for a control arm.

Fig. 15 is a plan view of portions of the correcting device, and p Fig. 16 is a perspective view showing parts in positions assumed after beginning an operation.

The accumulator carriage of a calculating machine equipped with stepped drums is provided (as disclosed in Swiss PatentNo. 245,418 of H. W. Egli A. G.) with a rigid frame comprising, as shown in'Fig. 1, two longitudinal horizontal main plates I and 2 rigidly interconnected by stay bolts 3, a bottom plate 5 being mounted to the lower main plate I by stay bolts 4 and a head plate I to the top main plate 2 by stay bolts 6. Five parallel totalizer shafts 3 are iournaled in bottom plate 5 and head plate 7, and are provided at their foot end with a bevelgear 9 pinned thereto. Gear 9 cooperates with a pair of gears In (Fig. 3) which are pinned to a common hub. Thus a reversing spool gear of known type is afforded, operable by means of a control bar (not shown) to-slide on the square shaft ll so as to bring one or the other gear [0 into mesh with gear 9 of shaft Z according to whether the latter is to be turned in the additive or subtractive sense. The squareshafts I l are rotated (in a manner known. per se) by stepped drums (not shown). A dial l2 (Figs. 1, 5) is mounted to each shaft 8 and may be viewed through a window [3 provided in head plate 1. sleeve l4 (Figs. 3,4) mounted on the respective shaft 8. Two toothed gear wheels 15 and [6 are pinned to the ends of sleeve l4, and a disc H to the bottom end thereof.v Disc I! is coupled to a spider I9 by means of a pin I8, spider 19 having a recess 2 (Fig.9) for engaging pin l8. Toothed wheels l5 possess (according to Figs. 7- 10) aninterdental gap intermediate of any 8 subsequent teeth. Recess 20 of spider I9 of shaft 8, being associated with a first calculating position, corresponds, according to Fig. 2, to the diameter of coupling pin l8.. The appurtenant disc I! has a circular periphery, whereasv the other discs ll have a notched periphery. Recess 20 of the spiders l9 associated with the remaining totalizer shafts 8, is so dimensioned asto permit of a predetermined relative rotation between disc l1 and spider [9; the castellated or notched discs I! represent correction discs. A tension spring 2| biases pin l8 into abutment against one end of elongated recess- 20 in the said spiders l9. Aninternal gear 22 is pinned to each spider l9 and meshes with two planet wheels 23 (Fig. 4) which are pivoted, diametrically op posite to each other, toa common mount 24 Dial I2 is pinned to the top end of 9.

3 which is fastly secured to the respective totalizer shaft 8. The planet wheels 23, on the other hand, enmesh with a sun wheel formed by a pinion mounted on shaft 8. The sleeves I4 of adjacent shafts 8 are of different lengths so that a total of two groups of sleeves I4 are formed and, therefore, the correction discs I I in the said frame are distributed in two planes, as are the internal gears 22 of'the planet gears, in order to permit of placing shafts 8 as close as possible to each other. To such end the adjacent dials I2 also are superposed in two planes. The pinions 25 of the first, third and fifth ordinal columns thus are situated in the said frame on a lower level than the pinions 25 of the second and fourth ordinal columns. The pinions 25 of the second group are provided with a depending hub 26 (Fig. 4) which at its foot end has a gear 2'! pinned thereto. Gears 2'! are situated at one and the same elevation with the pinions 25 of the first group. A set collar 28 mounted on each shaft 8 permits of raising or lowering sleeve I4. Bevel gear 9 pinned to the foot end of shaft 8 is provided with a locking disc 30 secured to its hub 28. Disc 30 is circumferentially notched for positively engaging a leaf spring 3I (Fig. 5) secured to the underside of main plate I, so as to maintain shaft 8 and, therefore, the corresponding dial I2 (by way of planet gears 25, 23, 22) in the correct indicating position.

An auxiliary shaft 32 (Figs. 3, 5) is associated with two adjacent totalizer shafts 8 each, parallel thereto, and a gear 33 pinned thereon meshes with gear I6 of. sleeve I4 of an adjacent shaft 8. A pinion 34 is pinned to the foot end of auxiliary shaft 32, which latter is journaled in the main plates I and 2, and meshes with a gear 35 which is pivoted on a stud 38 (Fig. 5) secured to main plate I and is operatively connected with the pinion 25 of the shaft 8 belonging to the next higher ordinal column, either by direct engagement with the pinion 25 situated on the same level, or by way of gear 21 when the corresponding pinion 25 is situated on a higher level than the associated gear 33. Sleeves I 4 of shafts 8, and thus the dials I2, are rotatably interconnected, such a driving ratio being provided that, when dial I2 of one ordinal column is rotated by one division or unit respectively, dial I2 of the next higher column is turned by one tenth of its own division (unit), even when a number (given by the calculation) is set at the same time, into such column by means of dial I2. Let us assume, number 385 has been transferred into the accumulator, dial I2 of the unit column then is in a position in which digit 5 appears fully in the respective window I3 of head plate I. Dial I2 of the tens column has been rotated, additionally to its rotation from 0-8, by one half of a division, since dial I2 of the unit column has been rotated by five units. The central portion of the dial I2 associated with the tens column, therefore, becomes visible between the digits 8 and 9 in the corresponding window I3 of head plate I. Dial I2 in the hundreds column has been turned from 0 to 3 and additionally, from the unit column by 1 of a division and, from the tens column by 1% of a division so that such dial I2 does not indicate (in the respective window I3 of head plate 'I) the digit 3 as required by the number (385) essential for the calculation. In order to obtain the correct numerical indication, the dials I2 of the tensand hundreds-columns have to 4 be turned back by the amount of the additional rotation mentioned. To such end, the said correction discs I! are used, as well as their associated parts and portions which will be described below.

The numeral 3! in Fig. 11 designates the main shaft of the calculating machine, which is journaled in two rigidly interconnected side shields 38 and 39 which pass, with a stepped portion, underneath main plate I, and shields 38 and 39 are at right angles to the latter. A cam disc 40 is pinned to main shaft 31 and cooperates with a bell crank M which is pivoted on a pin 42 fastly secured to shield 38. Bell crank 4I is biasedby a tension spring 43 which engages the second arm thereof. The latter receives a rod in a fork 44 below main plate I. Rod 45 is supported at its ends in two levers 46 and 41 passing through openings in the bottom main plate I. Levers 46 and 41 are fulcrumed on a bar 48, and thus an oscillating' structure is formed. The latter is journaled inthe bearing blocks 48 and 58 which are secured to main plate I and receive the bar 48. The said structure cooperates, by means of a second arm of lever:4I, with a twoarm auxiliary lever 5| which to such end is' provided with a skew face 52 at one end. Auxiliary lever 5I is pivoted on a stud 53 securedt'o main plate I, and is adapted, at its second arm, as fork 54 which receives a pin 55 of-a flat control bar 56. The latter has longitudinal slots 57 wherein pins 58 of correction levers 59 areengaged. A correction lever 59 is associated with each ordinal column, with the exception" of the unit column, and is of angular; shape. (Fig. 5) and cooperates with the correction disc I'I provided on the respective totalizer shaft 8; Each of the, four correction levers 59 shown, We of which are disposed below and two above control bar 56, is pivoted on a vertical pin 68'secured to main plate I, andis biased by'a spring BI into abutment against the periphery of the respective correction disc I I. A spring 62 acts onto auxiliary lever 5I (Fig; 11a).

The correction gear described operates as follows:

According to the example assumed above, the number 385 has been transferred into the accumulator, the dials I2 of all ordinal columns, with the exception of the unit column, being not in their proper indicating position, as explained above, due to the additional rotation impressed thereon. The correction takes place automatically at the end of a calculating operation, 1. e. during the last revolution of main shaft 31 which is rotated by means of crank 53 and handle 64 (clockwise in Fig. 11). Bell crank 4I thereby is rocked by cam disc 40 into a predetermined position, in which it is disengaged from recess provided on disc 48 and locked by dog 18. mounted on shaft 68, the said dog cooperating with pin II on crank 4!; see Fig. 16. During such rocking, structure 4548 is rocked by bell crank 4| so that lever 47 turns auxiliary lever 5| over the latters skew face 52 against the action of spring 62. Control bar 58 thus is displaced, in direction of the arrow shown in Fig. 11a, so far as to disengage the correction levers 59 coupled thereto from the notches of correction discs I1, and to release the latter for rotation. At the end of a revolution of main shaft 3?, bell crank 4I again may bebrought to cooperate with cam disc 48 or into engagement with recess I4 thereof respectively. Bell crank 4|, however, remains locked in said position by dog I0, until handle 84 is drawn rearward by spring 65, thus bringing pin 65 into the track of detent 61. Pin 66 then abuts against detent 67 and swings same backward against the action of spring 69, whereupon dog ll! trips bell crank 4|, due to a corresponding rocking of shaft 58. Bell crank 4| then is tripped also, swings back under the influence of spring and again is engaged in recess 14 or cam disc When bell crank M swings back, it also swings back the structure 45- 41, spring t2 biasing auxiliary lever 5| act ing to restore control bar as so that the state of conditions according to Fig. ll is re-established. Such restoration only will be brought about when the numerical value set into the calculating machine has been transferred into the accumulator, as otherwise, at each revolution of main shaft 3?, bell crank l| inadvertently would drop into re" cess i i of cam disc All in the course of the calculating operation, either when multiplying or dividing.

When transferring the numerical value in question into the accumulator, dials l2 are set in the manner described, bell crank 4| of the correction gear being disengaged from cam disc 46. During the last revolution of main shaft 37, the correction gear again is brought intthe state according to Fig. 11, the correction levers 5!), being biased by the springs in, being rocked with their cranked end against the correction disc N (Fig.

5), due to the restoration of control bar 5%. When an indicatin dial i2 is in correct indicating position as represented by its figure. the proper cor recting lever 59, as a result of the pivoting action, comes to rest on a tip of the proper correcting disk ii; the units place has no correcting lever 59 assigned to it. The correcting disks IT of the indicating disks 2 which have had imparted to them a rotational movement adapted to positively effect carrying over (transfer) of the tens units, assume a position in which the proper correcting lever 59 cooperates by means of its arcuate edge surface with a notch of the proper correcting disk ii. In this way the correcting levers 59 are swung by their retractile springs 6| to such an extent that they repose with their tips at the bottom of the proper notches when the correcting disks are suitably turned back, whereupon the indicating dials l2 assigned to the tens, hundreds, and higher calculating positions and which have been turned for the purpose of carrying the tens forward, will be in numerically correct indicating position or again in zero position, if, during the calculating procedure they were not turned at least one unit. The totalizer shafts 3 must remain unbiased by the said turning back of dials l2 and correction discs ll respectively, in order to maintain the re., istered numerical value unchanged for an eventual extension of the calculating operation. To such end, the'leaf springs 3! (Fig. 5) acting on the locking discs are subjected to a higher stress than the springs 2| (Fig. 5) biasing the coupling pins it of the corrections discs H. The couplin pins, by the springs 2|, normally are held in abutment (in the sense of Fig. 2) against one end of recess 29 provided in spider Hi. The said recesses 2E1 permit of effecting the idling run required for the said turning back of dials 12.

Since during the calculating operation, dial :2 of the units column does not have to perform an additional rotation, pinion 25 associated with a planetary gear of this first column, is locked peripherally against rotation by a detent 18 (Fig. l.)

secured to main plate i.

For the purpose of zeroizing the numerical values transferred into the accumulator, gear I5 6 (Figs. 1, 5, 7-10) provided on sleeve ll of each shaft 8, cooperates with a rack 89'1ongitudinally displaceable on the top main plate 2 in guide lugs is. The toothing of clearing rack 80 is sectionalized,i. e. interrupted, at five points (or respectively on as many points as there are totalizer shafts 8) and the gears iii, in the inactive position of the correction and the zeroizing gear, have their interdental gaps opposite to the corresponding toothless section of clearing rack 89 (Fig. 7). The clearing gear, further, possesses a restoring slide, shown in Fig. 6, which is guided displaceable, on fixed threaded pins engaged in the two upper slots ill, by two brackets 82 and 83 fastly secured to main plate 2. Restoring slide 8|, according to Fig. 1, is coupled at the right hand end to a detent arm M which is pivoted to a bracket t5 secured to head plate 1, and which serves for cooperating with a dog 6 secured to clearing rack 85 A spring 8! engages the left-hand end (as seen in Fig. l) of restoring slide 8|, and the latter on the bottom is guided displaceably, at the said end, on a fixed threaded pin which is engaged in a slot Si" (Fig. 6). The said latter pin is mounted on a bracket as, Fig. l, fixedly secured to the lower main plate l. Two square followers 8Q are secured to restoring slide 8!, in a lower and an upper plane each, each to cooperate with a stay pin 95 (Figs. gear 22 of the planetary gear disposed in the corresponding plane.

The spring ill, biasing restorin slide 8|, tends to maintain the latter in such position that the said pins iii mayfreely pass by the followers 89 of slide 8|, when registering numerical values into the accumulator. The restoring slide 8|, therefore, remains unbiased during such registry. Clearing rack (ill, by a spring 9|, normally is held in the inactive position, in which (as shown in Fig. l a.) it abuts, by means of a pin 89, against,

a stop 92 fixed to main plate 2. Clearing rack at its other end is coupled to a two-arm intermediate lever 54 by means of a pin 93 (Fig. 11). Lever EM is pivoted on a pin to a bracket 96 fastly secured to main plate The second arm of lever 96 is coupled by a pin ill, to a fiat toothed bar 98 (also see Fig. 13), which is guided longitudinally displaceable on two fixed pins I08 by means of two slots 98. Pine ltd, as shown in Fig. 12, are secured to brackets liil provided on the underside of main plate According to ll, a key Hi2 is pivoted on a pin ltd fixed to the outside of the machine frame. Key E2 is formed as twc-arrn lever. and may cooperate, over its second arm, with the skew face ltd of a control slide H35 which is guided displaceable on the machine frame on two fixed pins lSl engaged in elongated slots let. Slide I05, biased by a spring 68%, engages the angular groove of a coupling portion i Itby means of a pin Hi9. Coupling portion i Mi is mounted axially displaceable, but non-rotatable, on main shaft 31, and the second coupling portion, H is mounted on latter rotatable, but axially non-displaceable.

Coupling portion 5 iii is provided with two diametrically opposite recesses H2 receiving two followers H3 fixed to coupling portion III, for the purpose of coupling the two portions. A

disc 1 Hi, one side of which adapted as com face for biasing the control arm H5, is fastly secured to coupling portion Hi. Arm H5 is pinned to a shaft I16 which is journaled in two brackets secured to shield 39. Another arm H8 is pinned to shaft ilB andbiased by a spring 9 so as to 3, 7-10) secured to the internal press arm H5 against disc II4. Lever II 8 cooperates with the teeth of bar 98.

The zeroizin or clearing operation is as follows:

Assuming digit 9 is set-in the accumulator, and shall be zeroized. Key Hi2 (Fig. 11) is depressed so as to be raised off a fixed supporting pin I20, and to longitudinally displace control slide I05, in cooperation with skew face I04 of the latter and against the action of spring I 08, so far as to bring coupling portion H into engagement with the followers I I 3 of coupling portion I I I, by means of pin I09 of slide I05, and thus to render the coupling III), HE operative. Zeroizing or clearing then is effected, when turning main shaft 31 (either by crank 63 in direction of the arrow shown in Fig. 11, or eventually by motor drive) by means of disc 2 I4 durin a revolution thereof. During a certain and comparatively short initial rotation of main shaft 3?, arm II5 (as shown in Fig. 11) first is rocked to the right by disc I I 4 and by means of delay step IEI (Fig. 14) only so far that arm II8 moves bar 93 (by way of shaft H5) for such a distance that the clearing rack 32 is displaced from the inactive position (shown in Fig. '7) in direction of the arrow by one step into the position shown in Fig. 8. In the latter, a tooth of clearing rack 80 is brought into engagementwith a corresponding terminal tooth of gear I5 associated with each sleeve I4. The latter then cannot follow the tension of spring 2! which engages spider i9, when correction disc I'I- in accord with the explanation given be1owis tripped for rotation. In the inactive position of clearing rack 86, the toothless sections thereof are opposite the toothless sections of gears l5, as shown in Fig. '7.

The said rocking of arm I i5 stops, in that the latter is contacted by a plane face I22 provided on disc II4 (Fig. 14) so that durin the corresponding further partial revolution of main shaft 3'1, clearing rack 88 remains in its given position. At this time, the correction arms 59 are so rocked by means of cam disc 40 (Fig. 11) through bell crank 4! of the correction gear, oscillating structure 45- i8, auxiliary lever SI and rod 56, as to trip the correction discs I"! for rotation.

Arm H5 then is swung further to the right (with respect to Fig. 11), by the delay step I23 (Fig. 14) of disc H4, so that clearing rack 80 is displaced by a further step against the action of spring SI, i. e. to the left with respect to Figs. 5 and 11, and to the right with respect to Fig. 1. Pin 86 secured to clearing rack 85, then enters into cooperation with arm 84 pivoted to head plate I, thus displacing restoring slide 81 against the action of spring 8?. During the aforesaid second stepwise movement of the clearing rack 80 the toothed crown of the sleeve I4 comes into the position shown in Fig. 9, that is, the correcting disk I? and the proper indicating dial i2 are turned back a slight amount less than nine figure divisions; the missing amount results from the circumstance that the toothed sleeve I4 which forms a rigid unit with the correcting disk I! and the indicating dial I2 and which sleeve is rotatably journaled on the result shaft 8, is held back by the retractile spring 2! attached to the pin I8 of the correcting disk [1. The respective terminal tooth of gear I5, which last has come into engagement with clearing rack 89, thus is held in abutment against the teeth of clearing rack 80, in the sense of Fig. 9. The respective totalizer shaft 8 has been left behind by a full ordinal division, due to the braking action performed by leaf spring 3| (Fig. 5) onto its locking disc 30 (during the tension of spring ZI) until the said pin I8 of disc I! has reached, according to Fig. 9, the second end of recess 20 in spider I9.

Clearing rack 80, upon its second step initiated by the delay step I23 of disc H4, is displaced so far that restoring slide BI is moved by the pin 86 of the clearing rack, in cooperation with arm 84, through such distance that pin (secured to spider I9) is taken along by the follower 89 of slide BI and, therefore, spider I9 is rotated together with gear 22. The operative state of Fig. 9 thus is replaced by that of Fig. 10, the said shaft 8 having been turned back, as required, by the full division which has been left behind up to now. Clearing rack and restoring slide 8| now have performed their full stroke in the said direction, whereby the dial I2 mounted on the said shaft 8 has been turned back from 9 to 0. i. e. into zero-position, and the respective bevel gear 9 of the apurtenant reversing spool gear If] has been turned back by 9 divisions. In this manner, the numerical value present heretofore in the accumulator, can be transferred into the keyboard setting mechanism or into an auxiliary gear. The coupling pin I8, at the transition of the operative state from Fig. 9 to that of Fig. 10, is moved away from one end of recess 20 in spider l9, and abuts against the other end thereof.

In the final phase of the revolution of main shaft 37, clearing rack 80, under the influence of spring 9|, is returned into the initial or inactive position respectively, taking along the restoring slide 8|.

The inventive mechanism, of course, also may be applied to calculating machines which do not operate according to the decimal system. In such case, the driving or transmission ratio for the planet gears 22-25 associated with the totalizer shafts 8 has to be selected such that, upon rotating a shaft 8 through one unit, the shaft of the next higher denominational order is rotated through the requisite fraction of such unit in order thatafter a full revolution of the said first shaftthe said second shaft has been rotated through a unit of its own denominational column. Further, my present invention is not limited to calculating machines in which, as in the example described, the zeroizing mechanism possesses a rack as main element, which is common to all the dials, and in which the tens-transfer is produced by planet gears. The inventive zeroizing mechanism also may be used when dials formed by rollers are disposed on a continuous shaft, and when the clearing rack provided in the example described, is replaced by segmental clearing gear disposed on a shaft.

What I claim and desire to secure by Letters Patent is:

1. Calculating machine provided with figure carriage, the result mechanism of which is provided with parallel result shafts on each of which a toothed sleeve is rotatably mounted which carries an indicating dial and a correction disk, the toothed sleeves being provided with mutual driving connections for positively effecting the tens transfer by a partial crawl carry of the indicating dial, each correction disk having a correcting lever and a coupling pin assigned to it, the latter being intended for effecting the cooperation of a toothed crown of one of the planetary gears assigned to the indicating dial with planetary wheels carried by the result shafts and for effecting meshing with the pinions rotatably disposed on the result shafts, the coupling pin being adapted to have a certain amount of play (idling), the said toothed sleeves having a common clearing rack, which has a stop for operating a restoring setting slide which is provided with stops for cooperating with coacting stops present on the aforesaid concentric toothed crowns of the planetary gears for the purpose of effecting the final return step of said indicating dials into zero position, a drive shaft being provided with two cam disks, one of said cam disks being operatively connected with said clearing rack for moving the same upon rotation of the drive shaft, and the other cam disk being op:- eratively connected with a control bar for moving said correcting levers.

2. Calculating machine according to claim 1 and in which a clutch is provided on the drive shaft which is adapted to be engaged by means of a key for starting the movement of the restoring rack.

3. Calculating machine according to claim 1, and in which a clutch is provided on the drive shaft, said clutch being engageable by means of a key for starting the movement of the restoring bar.

4. Calculating machine according to claim 1, and in which a clutch is provided on the drive shaft, said clutch being engaged and disengaged by means of a key through intermediary of a spring-loaded operating slide so as, when engaged, to initiate the movement of the restoring bar.

5. In a calculating machine, a figure mechanism carriage with a result mechanism having result shafts disposed parallel to each other, a rotatable toothed sleeve on each shaft, an indicating dial carried by the sleeve, means for establishing mutual driving connection between the toothed sleeves of successive result shafts to positively effect the tens transfer by a partial crawlcarry procedure. said means including a planetary gear assigned to each indicating dial and having a central pinion rotatably mounted on each shaft, an internal gear crown concentric with the pinion, and planet wheels meshing with said pinion and said gear crown, a lost motion connection between said gear crown and said toothed sleeve, spring means for holding said gear crown at one end of the lost motion movement, gear wheels for connecting said gear crown of one result shaft to the central pinion of the planetary gear of the result shaft of the next higher value position, a clearing rack common to all said toothed sleeves of the result shafts, a drive shaft for said clearing rack, a cam disc on the drive shaft, means operatively connecting said cam disc to the clearing rack, a dog on said clearing rack, a restoring slide coacting with said dog and provided with stops, said internal gear crowns of the planet gears having stay pins cooperating with said stops on the restoring slide, whereby upon rotation of the drive shaft said stops act on the stay pins of the gear crowns for turning the latter and effecting the final return step of said indicating dials into zero position.

HEINRICH SUTER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,128,679 Gooch Feb. 16, 1915 1,246,087 Gooch Nov. 13, 1917 1,281,163 Hopkins et a1 Oct. 8, 1918 1,853,054 Horton Apr. 12, 1932 2,008,124 Bialik July 16, 1935 2,020,975 Turck Nov. 12, 1935 2,089,682 Chase Aug. 10, 1937 2,222,164 Avery Nov. 19, 1940 2,329,649 Pinyan Sept. 14, 1943 FOREIGN PATENTS Number Country Date 217,539 Switzerland June 16, 1942 

